Carbon dioxide reusing system and method

Abstract

A system and a method for reusing carbon dioxide are provided. The system includes: a process apparatus configured to discharge exhaust gas containing carbon dioxide therefrom; a purifying device configured to purify the exhaust gas, and thus produce reused carbon dioxide from the exhaust gas and store the produced reused carbon dioxide; a first supply tank configured to receive the reused carbon dioxide from the purifying device; a second supply tank configured to receive the reused carbon dioxide from the first supply tank and provide the reused carbon dioxide to the process apparatus; and a blocking device configured to, based on determining that a purity of the reused carbon dioxide provided from the purifying device to the first supply tank fails to satisfy a predefined reference, block flow of the reused carbon dioxide from the purifying device to the first supply tank.

What is claimed is: 
     
       1. A system for reusing carbon dioxide, the system comprising:
 a process apparatus configured to discharge exhaust gas containing carbon dioxide therefrom; 
 a purifying device configured to purify the exhaust gas, and thus produce reused carbon dioxide from the exhaust gas and store the produced reused carbon dioxide; 
 a first supply tank configured to receive the reused carbon dioxide from the purifying device; 
 a second supply tank configured to receive the reused carbon dioxide from the first supply tank and provide the reused carbon dioxide to the process apparatus; and 
 a blocking device configured to:
 determine whether a purity of the reused carbon dioxide provided from the purifying device to the first supply tank satisfies a predefined reference; and 
 based on determining that the purity of the reused carbon dioxide provided from the purifying device to the first supply tank fails to satisfy the predefined reference, block flow of the reused carbon dioxide from the purifying device to the first supply tank. 
 
 
     
     
       2. The system of  claim 1 , wherein while the blocking device blocks the flow of the reused carbon dioxide, the first supply tank is configured to provide previously stored reused carbon dioxide therein to the second supply tank. 
     
     
       3. The system of  claim 1 , wherein the system further comprises:
 a first pipe that connects the purifying device to the first supply tank; and 
 a valve installed at the first pipe, the valve configured to block the flow of the reused carbon dioxide to the first supply tank, 
 wherein the blocking device comprises:
 a sampler configured to sample the reused carbon dioxide in the first pipe; 
 a first analyzer configured to determine whether the purity of the sampled reused carbon dioxide satisfies the predefined reference, and generate an analyzing result of the purity of the sampled reused carbon dioxide; and 
 a controller configured to receive the analyzing result and provide a control signal based on the analyzing result to the valve. 
 
 
     
     
       4. The system of  claim 1 , wherein the purifying device comprises:
 a collector configured to collect the exhaust gas; 
 a purifier configured to purify the collected exhaust gas to produce the reused carbon dioxide; and 
 a recovery tank configured to store therein the reused carbon dioxide produced by the purifier, 
 wherein the purifier comprises a first purifier and a second purifier arranged sequentially and consecutively, 
 wherein the first purifier is configured to remove moisture from the exhaust gas, and 
 wherein the second purifier is configured to remove organic impurities from the exhaust gas. 
 
     
     
       5. The system of  claim 4 , wherein the system further comprises an analyzer configured to determine whether a purity of the reused carbon dioxide stored in the recovery tank satisfies another predefined reference. 
     
     
       6. The system of  claim 5 , wherein the blocking device and the analyzer are configured to employ a same purity reference value as the predefined reference. 
     
     
       7. The system of  claim 1 , wherein the system further comprises:
 a purifier configured to receive the reused carbon dioxide from the second supply tank and remove residual impurities therefrom; and 
 a filter configured to receive the reused carbon dioxide from the purifier, filter the reused carbon dioxide by removing particles inside the reused carbon dioxide, and then provide the filtered reused carbon dioxide to the process apparatus. 
 
     
     
       8. The system of  claim 7 , wherein the system further comprises:
 a pipe for connecting the purifier to the filter; and 
 an analyzer connected to the pipe, 
 wherein the analyzer is configured to determine whether a purity of the reused carbon dioxide flowing in the pipe meets the predefined reference. 
 
     
     
       9. The system of  claim 1 , wherein the system further comprises a boiler that is configured to operate using liquefied natural gas (LNG) as a fuel to discharge additional exhaust gas containing carbon dioxide therefrom,
 wherein the purifying device is further configured to purify the additional exhaust gas discharged from the boiler, and thus produce additional reused carbon dioxide therefrom and store the produced additional reused carbon dioxide. 
 
     
     
       10. A system for reusing carbon dioxide, the system comprising:
 a process apparatus configured to discharge exhaust gas containing carbon dioxide therefrom; 
 a purifying device configured to purify the exhaust gas, and thus produce reused carbon dioxide from the exhaust gas and store the produced reused carbon dioxide; 
 a first analyzer configured to analyze the reused carbon dioxide stored in the purifying device to determine whether a purity thereof meets a predefined reference; 
 a first supply tank configured to receive the reused carbon dioxide from the purifying device; 
 a first pipe that connects the purifying device to the first supply tank; 
 a sampler configured to sample the reused carbon dioxide in the first pipe; 
 a second analyzer configured to analyze the sampled reused carbon dioxide to determine whether a purity thereof meets the predefined reference, and generate an analysis result based on an analyzing result of the purity of the sampled reused carbon dioxide; 
 a controller configured to receive the analyzing result and provide a control signal based on the analyzing result to a valve; 
 the valve, the valve installed at the first pipe and configured to block flow of the reused carbon dioxide to the first supply tank based on the control signal; and 
 a second supply tank configured to receive the reused carbon dioxide from the first supply tank and supply the reused carbon dioxide to the process apparatus. 
 
     
     
       11. The system of  claim 10 , wherein the system further comprises a boiler that is configured to operate using liquefied natural gas (LNG) as a fuel to discharge additional exhaust gas containing carbon dioxide therefrom,
 wherein the purifying device is further configured to purify the additional exhaust gas discharged from the boiler, and thus produce additional reused carbon dioxide therefrom and store the produced additional reused carbon dioxide.